期刊文献+

基于S-变换的水文时间序列演变特征研究 预览 被引量:5

Evolution Characteristics of Hydrological Time Series Based on S-transform
在线阅读 下载PDF
收藏 分享 导出
摘要 水文时序的多时间尺度分析对深入认识流域水文系统的演变特征及中长期水文预报有重要意义,但目前常用的短时Fourier分析,小波变换以及H ilbert-Huang变换等方法均有各自的不足之处.文中尝试运用现代时频分析工具S变换对于桥水库1956—2000年的年入库流量时序进行了时频分析,得到了该水文序列频谱在时-频平面上的三维分布图,它清晰地显示了该时间序列在不同时段内的多时间尺度演变特征.然后通过分析频谱图的拓扑结构,总结了于桥水库年径流量演变过程的关键特征.结果表明,S变换克服了小波变换或Huang变换(EMD)会因分解层数确定的主观性而可能产生的混频现象,这使它在水文时间序列多时间尺度分析及其特征提取方面有着广泛的应用前景. Multiple time scale analysis of hydrological time series has important significance for acquiring deeply understanding hydrological system evolution characteristics and mid-long term hydrological forecasting.But the common methods,such as Fourier transform,wavelet analysis and Hilbert-Huang transform,have disadvantages of their own.Stockwell-transform(S-transform),a tool of modern time-frequency analysis method,was introduced and applied to the case study of annual inflow series of Yuqiao Reservoir for the years 1956—2000.And therefore,the 3-dimension spectrogram of the series was drawn,which clearly displayed the multiple time scale evolution characteristics of the time series in the different periods.Furthermore,through analyzing the spectrogram's topological structure,the key characteristics of the Yuqiao Reservoir's annual inflow evolution process was obtained.The result shows that S-transform solves the frequency mixing problems which could be induced by the arbitrary number of decomposition layers of wavelet transform and Huang transform(EMD),which indicates that S-transform will have an extensive application prospect in the multiple time scale analysis and feature extraction of hydrological time series.
作者 冯平 牛军宜 张伟 FENG Ping,NIU Junyi,ZHANG Wei(1.School of Civil Engineering,Tianjin University,Tianjin 300072,China;2.Tianjin Survey and Management Center of Hydrology and Water Resources,Tianjin 300061,China)
出处 《应用基础与工程科学学报》 EI CSCD 2011年第1期 1-8,共8页 Journal of Basic Science and Engineering
基金 国家自然科学基金(50879051)
关键词 水文系统 时间序列 S变换 时频分析 频谱 拓扑结构 系统分析 hydrological system time series stockwell-transform time-frequency analysis spectrum topology structure system analysis
作者简介 作者简介:冯平(1964-),男,博士,教授。博士生导师.E-mail:Fengping@tju.edu.cn
  • 相关文献

参考文献18

  • 1夏军著..水文非线性系统理论与方法[M].武汉:武汉大学出版社,2002:431.
  • 2张贤达,保铮著..非平稳信号分析与处理[M].北京:国防工业出版社,1998:446.
  • 3胡劲松 ,杨世锡 .基于HHT的旋转机械故障诊断方法研究[J].动力工程,2004,24(6):845-851. 被引量:15
  • 4耿萌,石林锁.三种非平稳信号时频分析的方法[J].机械工程与自动化,2008(1):108-109. 被引量:12
  • 5陈雨红,杨长春,曹齐放,李波涛,尚永生.几种时频分析方法比较[J].地球物理学进展,2006,21(4):1180-1185. 被引量:85
  • 6吴正国等编著..现代信号处理技术 高阶谱、时频分析与小波变换[M].武汉:武汉大学出版社,2003:283.
  • 7Stockwell R G,Mansinha L,Lowe R P.Localization of the complex spectrum:The S transform[J].IEEE Transactions on Signal Processing,1996,17:998-1001. 被引量:1
  • 8Pinnegar C,Mansinha L.Time-local Fourier analysis with a scalable,phase-modulated analyzing function:The Stransform with a complex window[J].Signal Process,2004,84(7):1167-1176. 被引量:1
  • 9Stockwell R G.A basis for efficient representation of the S-transform[J].Digital Signal Processing,2007,17:371-393. 被引量:1
  • 10Fritts D,Riggin D,Balsley B,et al.Recent results with an MF radar at McMurdo,Antarctica:Characteristics and variability of motions near 12-hour period in the mesosphere[J].Geophysical Research Letters,1998,25(3):297-300. 被引量:1

二级参考文献78

共引文献208

同被引文献90

引证文献5

二级引证文献47

投稿分析

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部 意见反馈